The first part's almost done, and another guy is going to be taking over for the second part while I get up to speed on his stuff (which is similar -- there are only two of us familiar with this collection of code). And I smell a fish, because once he's up to speed on my stuff (not that I've been hoarding information), I'm expendable. [emphasis added]

Or he is. And he probably realizes this, too, and is feeling just as paranoid.